VALVE-TYPE INDUCTOR MOTOR Russian patent published in 1997 - IPC

FIELD: electrical engineering; high-torque electric drives. SUBSTANCE: motor has rotor 1 with teeth 2 and stator 3 with two poles 4-15 whose inner surface carries Z_s elementary teeth 16. Stator 3 and rotor 1 have same tooth pitch t_z. Center lines of adjacent teeth of adjacent poles are spaced ap[art through (K±1/2m)t_z(K = 1,2 ...),; large slots between poles accommodate motor m-phase winding 17 and those between elementary teeth of 2 mq (q=1,2,... , P) poles receive coils of m-phase sensor 18, one coil on each pole half. Coils are appropriately interconnected to form coil groups and the latter form circuits. Circuits of coil groups on poles with numbers differing by m are series- connected by finishing leads and at points of connection there are made m-phase terminal leads of sensor 18. Starting leads of m circuits that function as starting leads of coil groups placed on even- and odd- numbered poles are interconnected and single-phase terminal lead of sensor 18 is made at their point of connection. According to invention, stator 3 is built up of two different-length stacks and winding of sensor 18 os placed on stack of smaller length. EFFECT: improved power characteristics of motor, reduced speed pulsation due to lower torque pulsation level. 3 dwg